# Trajectory is not readable

**URL:** <https://gromacs.bioexcel.eu/t/trajectory-is-not-readable/2667>\
**Category:** User discussions\
**Tags:** mdrun, analysis-tools\
**Created:** [August 11, 2021, 12:45pm UTC](https://gromacs.bioexcel.eu/t/trajectory-is-not-readable/2667 "2021-08-11T12:45:13Z")\
**Posts on this page:** 1\
**Page:** 1

<div class="post-metadata">

**Author:** ![subhomoiBK](https://avatars.discourse-cdn.com/v4/letter/s/9fc29f/32.png) [@subhomoiBK](https://gromacs.bioexcel.eu/u/subhomoiBK)\
**Post date:** [August 11, 2021, 12:45pm UTC](https://gromacs.bioexcel.eu/t/trajectory-is-not-readable/2667/1 "2021-08-11T12:45:14Z")

</div>

GROMACS version: 2018.8  
GROMACS modification: No  
I was checkig a trajectory and found an error

Checking file md.xtc

* * *

Program: gmx check, version 2018.8  
Source file: src/gromacs/fileio/trxio.cpp (line 980)  
Function: bool read\_first\_frame(const gmx\_output\_env\_t \*, t\_trxstatus \*\*, const char \*, t\_trxframe \*, int)

Assertion failed:  
Condition: !bOK  
Inconsistent results - OK status from read\_first\_xtc, but 0 atom coords read

The xtc is not readable. Is there any way to repair it? Kindly suggest.